APA (7th ed.) Citation

Bull, H., & Watson, A. (1988). The Expansion of international society. Clarendon.

Chicago Style (17th ed.) Citation

Bull, Hedley, and Adam Watson. The Expansion of International Society. Oxford [etc.]: Clarendon, 1988.

MLA (9th ed.) Citation

Bull, Hedley, and Adam Watson. The Expansion of International Society. Clarendon, 1988.

Warning: These citations may not always be 100% accurate.